Plumb-level.



, IND- 7|4,957 Patented Dec. 2, |902,

0. F. SUGAR. v

PLUIE LEVEL. Y (Applimmn med xm. 1a, 1902.1 (No Model.)

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' Unire Srarns ArnNT OFFICE.

ORVIG F. SINIGAR, OF CANTON, OI-IIO.`

PLUME-LEVEL.

SPECIFlCATI-GN forming part of Letters Patent No. 714,957, datedDeeembel` 2, 1902.

Application filed March 13, 1902. Serial No` 98,056. (No model.)

T0 @ZZ whom it may con/carni:

Beit known that I, ORWIG F. SINIGAR, a citizen of the United States,residing at Canton, in the county of Stark and State of Ohio, haveinvented certain new and useful Improvements in Plumb-Levels; and I dodeclare the following to be a full, clear, and exact description ot' theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to levels, and particularly to plumb-levels.

The object of the invention is to provide a plumb-rule so constructed asto admit of the use of an ordinary plumb-bob in leveling and also soconstructed as to obviate liability of warping of the rule.

With this and other objects in view, which will readily appear as thenature of the invention is better understood, the same consists incertain novel features of construction and combination and arrangementof parts, which will be hereinafter fully described, detined in theappended claims, and illustrated in the accompanying drawings, in Which-Figure 1 is a front elevation of a plumblevel embodying my invention,the same being arranged as forleveling. Fig. 2 is a crosssection of thesame on the line 2 2 of Fig. 1. Fig. 3is a cross-section on the line 3 3of Fig. 1. Fig. 4 is a fragmentary face view showing the lower portionof the rule broken away to expose the folded arms.

Referring now more particularly to the drawings, the numeral 1represents the plumb body or rule, in which is embedded a casing 2,having arranged therein a hand orpointer 3, which is attached to a shaftor arbor 3. The plumb-rule also has a plumb-bob aperture 4, whose axislies in the plane of a longitudinal guide mark or groove 5, whichcoincides with the axis of the hand 3, which normally traverses thelower half-circle of a scale 2 upon the face of the base-plate of saidcasing 2. The line 7, which carries the plumb-bob 8, is connected to aring or eye 6 on the casing 2, wherebywhen the rule is disposed at anangle to the perpendicular the degree of inclination will be shown bythe hand 3, pointing to the scale-mark brought beneath it.

In accordance with myinvention the plumb rule or body is composed of twolayers or strips 9 and 10 of wood, which are arranged so that the grainof one layer extends reversely to the grain of the other layer. By soconstructing the plumb rule or body the tendency of one layer or stripto Warp will be counteracted by the other strip, thus preventing warpingof the rule. rIhe two strips are united by gluing them together andusing in addition to the glue screws 1l or other suitable fastenings atdesired points.

In the bottom and side edges of the rule are formed grooves 12 and 13,and arranged in the bottom groove 12 is a plate 14, which projectsexteriorly to form a working edge. To this plate are hinged blades 14',which are adapted to fold into the side grooves and when unfolded toextend at right angles to the rule, with their lower edges in truealinement with the outer edge of the plate 14, and

thus to form therewith a working edge or surface for use in connectionwith the bob in determining horizontal lines or levels.

Spring-metal strips 15 are fixed at their in ner ends to the face of therule and carry at their outer or free ends locking-studs or latches 16,(one for each blade,) which work in openings in the rule and are adaptedto hold the blades in their open and closed positions. Each latchengages an opening 17 in the cooperating blade to hold the blade closedand a notch 1b in the edge of the blade to hold said blade open. Theblades are adapted to swing open by gravity when the latches areretracted, and the rule or body is turned to permit each in turn to dropdown out of its groove.

In using the device in determining a horizontal line or level the bladesare opened and locked, as in Fig. l, and the plumb-bob suspended inposition. The rule is then adjusted until the bob hangs perpendicularlyin line with the guide-groove, when the working edge formed by the plateand blades, in connection with the hand 3 and scale, will indicate thelevel or whether or not the surface under test lies in a true horizontalplane. If desired, the bob 8 may be reversed and allowed to hang belowthe edge 19 of the rule, which may be used as a working edge, in whichcase the line is connected to the eye 6 and the hand and arbor are alsoreversed and TOO coperate with the marks on the upper or oppositehalf-circle of the scale. In this operation it will of course beunderstood that the line is either shortened to support the plumpbobabove the surface to be measured or the bob is permitted to hang downbelow said surface, so as to allow the bob to have freedom of movement.`

From the foregoing description, taken in connection with theaccompanying drawings, the construction, operation, and advantages of myimproved level will be readilyapparent, it is thought, without requiringa more extended explanation.

Various changes in the form, proportion, and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of this invention.

Having thus described the invention, what is claimed, and desired to besecured by Letters Patent, is

1. A plumb-rule having opposite end working edges, a plumb-bob openingadjacent to one of said edges, an indicator disposed between the edges,and a plumb-bob reversible to coperate with either Working edge andadapted in one position to occupy said opening, substantially asspecified.

2. A plumb-rule having opposite end Working edges, foldable bladesadapted to form extensions of one of said edges, aplumb-bob openingadjacent to the working edge with which said blades coperate, anindicator disposed between the edges, and a plumb-bob reversible tocoperate with either working edge and adapted in one position to occupysaid opening, substantially as set forth.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

ORWIG F. SINIGAR.

Witnesses:

f DAVID OWEN,

EDWARD CASE.

